Matter-wave two-dimensional solitons in crossed linear and nonlinear optical lattices
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Data
2010-10-22
Autores
da Luz, H. L. F.
Abdullaev, F. Kh. [UNESP]
Gammal, A.
Salerno, M.
Tomio, Lauro [UNESP]
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Amer Physical Soc
Resumo
The existence of multidimensional matter-wave solitons in a crossed optical lattice (OL) with a linear optical lattice (LOL) in the x direction and a nonlinear optical lattice (NOL) in the y direction, where the NOL can be generated by a periodic spatial modulation of the scattering length using an optically induced Feshbach resonance is demonstrated. In particular, we show that such crossed LOLs and NOLs allow for stabilizing two-dimensional solitons against decay or collapse for both attractive and repulsive interactions. The solutions for the soliton stability are investigated analytically, by using a multi-Gaussian variational approach, with the Vakhitov-Kolokolov necessary criterion for stability; and numerically, by using the relaxation method and direct numerical time integrations of the Gross-Pitaevskii equation. Very good agreement of the results corresponding to both treatments is observed.
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Physical Review A. College Pk: Amer Physical Soc, v. 82, n. 4, p. 8, 2010.